J/ApJS/215/22 The Extended Virgo Cluster Catalog (EVCC) (Kim+, 2014)
The Extended Virgo Cluster Catalog.
Kim S., Rey S.-C., Jerjen H., Lisker T., Sung E.-C., Lee Y., Chung J.,
Pak M., Yi W., Lee W.
<Astrophys. J. Suppl. Ser., 215, 22 (2014)>
=2014ApJS..215...22K 2014ApJS..215...22K
ADC_Keywords: Clusters, galaxy ; Galaxies, spectra ; Photometry, SDSS ;
Radial velocities ; Morphology
Keywords: catalogs; galaxies: clusters: general; surveys
Abstract:
We present a new catalog of galaxies in the wider region of the Virgo
cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7.
The Extended Virgo Cluster Catalog (EVCC) covers an area of 725deg2
or 60.1Mpc2. It is 5.2 times larger than the footprint of the
classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the
virial radius of the Virgo cluster. We selected 1324 spectroscopically
targeted galaxies with radial velocities less than 3000km/s. In
addition, 265 galaxies that have been overlooked in the SDSS
spectroscopic survey but have available redshifts in the NASA
Extragalactic Database are also included. Our selection process
secured a total of 1589 galaxies, 676 of which are not included in the
VCC. The certain and possible cluster members are defined by means of
redshift comparison with a cluster infall model. We employed two
independent and complementary galaxy classification schemes: the
traditional morphological classification based on the visual
inspection of optical images and a characterization of galaxies from
their spectroscopic features. SDSS u, g, r, i, and z passband
photometry of all EVCC galaxies was performed using Source Extractor.
We compare the EVCC galaxies with the VCC in terms of morphology,
spatial distribution, and luminosity function. The EVCC defines a
comprehensive galaxy sample covering a wider range in galaxy density
that is significantly different from the inner region of the Virgo
cluster. It will be the foundation for forthcoming galaxy evolution
studies in the extended Virgo cluster region, complementing ongoing
and planned Virgo cluster surveys at various wavelengths.
Description:
The construction of the EVCC is based on the SDSS Data Release 7 (DR7;
Abazajian et al. 2009, II/294). The SDSS-DR7 images have pixel scale
of 0.396" and the average seeing of 1.4" correspond to a physical size
of 32pc and 112pc, respectively, at a Virgo cluster distance of
16.5Mpc. We took advantage of the SDSS spectroscopic data for the
determination of galaxy membership and classification of spectroscopic
morphology. The SDSS spectroscopic data were searched in the window of
175°<RA<200° and -4°<DE<25°, which defines the nominal
area of the EVCC (figure 1).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 186 1589 The Extended Virgo Cluster Catalog (EVCC)
table3.dat 134 1183 Galaxies in the VCC which are not in common
with the EVCC
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See also:
VII/266 : Atlas of Virgo galaxies (McDonald+ 2011)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/48 : CATALOGUE OF UV PHOTOMETRY OF VIRGO CLUSTER GALAXIES (Cornett+, 1982)
J/A+A/552/A8 : 454 VCC gal. revised coordinates (di Serego Alighieri+, 2013)
J/A+A/526/A114 : Kinematic profiles of Virgo early-type gal. (Toloba+, 2011)
J/MNRAS/412/2498 : Gal. groups & clouds in the local universe (Makarov+, 2011)
J/ApJ/714/25 : AMUSE-Virgo survey. II. (Gallo+, 2010)
J/AJ/139/315 : HI-selected galaxies in SDSS. Optical data (West+, 2010)
J/MNRAS/388/1537 : Galaxy pairs from SDSS-DR2 (McIntosh+, 2008)
J/AJ/135/1837 : Spectroscopy in A2199 and Virgo clusters (Rines+, 2008)
J/ApJ/681/197 : ACS Virgo Cluster Survey. XV (Peng+, 2008)
J/ApJ/660/1186 : VCC galaxies classification with SDSS (Lisker+, 2007)
J/ApJ/655/144 : ACS Virgo Cluster Survey. XIII. (Mei+, 2007)
J/MNRAS/370/1223 : Dynamical properties of nearby galaxy groups (Brough+, 2006)
J/A+A/430/411 : B-band photometry of ellipticals in Virgo (Gavazzi+, 2005)
J/A+A/417/499 : Spectrophotometry of Virgo cluster galaxies (Gavazzi+, 2004)
J/A+A/402/37 : UV-radio SED of galaxies in Virgo cluster (Boselli+, 2003)
J/A+A/401/471 : A1367, Coma and Virgo r' photometry (Cortese+, 2003)
J/ApJ/543/178 : Nearby Optical Galaxy (NOG) sample (Giuricin+, 2000)
J/A+AS/127/367 : Virgo Photometry Catalogue (VPC) (Young+ 1998)
J/A+AS/118/441 : Virgo + Fornax clusters galaxies UBVRI (Schroeder+ 1996)
J/A+AS/110/279 : Spirals in Virgo. III. (Sperandio+, 1995)
J/AJ/108/1598 : Virgo cluster ellipticals. III. (Ferrarese+, 1994)
J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)
http://sites.google.com/site/extendedvcc/ : EVCC home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- EVCC [1/2264] EVCC identifier (1)
6- 9 I4 --- VCC [1/2095]? VCC identifier
11- 15 A5 --- NGC ? NGC designation
17- 24 F8.4 deg RAdeg SExtractor Right Ascension (J2000)
26- 32 F7.4 deg DEdeg SExtractor Declination (J2000)
34- 41 F8.4 deg RAFdeg ? SDSS fiber location Right Ascension (J2000)
43- 49 F7.4 deg DEFdeg ? SDSS fiber location Declination (J2000)
51- 57 F7.4 arcsec Offset [0/86.5]? Offset between photometric center
and SDSS fiber location
59- 64 F6.1 km/s cz [-745/2983]? SDSS heliocentric radial velocity
66- 72 F7.1 km/s cz2 [-731/98610]? NED heliocentric radial velocity
74 A1 --- MmI [MP] Membership of galaxy from Virgo cluster
infall model (M=Member; P=Possible)
76 A1 --- MmV Membership of galaxy from VCC: M=Member,
P=Possible, B=background
78- 85 A8 --- MTyp1 Primary morphology
87- 88 A2 --- MTyp2 Secondary (SED) morphology (2)
90- 92 I3 --- TT1 [100/411] Numerical primary morphology (3)
94-112 A19 --- MTypV Morphology from the VCC
114-118 F5.2 mag umag SDSS u-band SExtractor AUTO magnitude
120-124 F5.3 mag e_umag Error in umag
126-130 F5.2 mag gmag SDSS g-band SExtractor AUTO magnitude
132-136 F5.3 mag e_gmag Error in gmag
138-142 F5.2 mag rmag SDSS r-band SExtractor AUTO magnitude
144-148 F5.3 mag e_rmag Error in rmag
150-154 F5.2 mag imag SDSS i-band SExtractor AUTO magnitude
156-160 F5.3 mag e_imag Error in imag
162-166 F5.2 mag zmag [7.6/19.7] SDSS z-band SExtractor AUTO magnitude
168-172 F5.3 mag e_zmag [0.03/2] Error in zmag
174-179 F6.2 arcsec Rad [4.9/477] Kron r-band radius
181-186 F6.2 arcsec R50 [0.8/102] SExtractor Half-light r-band radius
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Note (1): Galaxies with numbers larger than 2000 have radial velocities from
NED. ID is marked with the right ascension. The catalog of the
EVCC will be updated at http://sites.google.com/site/extendedvcc/
Note (2): The secondary morphological classification relies on the spectral
energy distribution (SED) shape and presence of Hα
emission/absorption lines (see section 3.2):
RA = red absoption galaxy. Overall SED shape of a typical early-type red
galaxy with an Hα absorption line.
RE = red emission galaxy. Overall SED shape of a typical early-type red
galaxy, but it has Hα in emission.
BA = blue absorption galaxy. Overall SED shape of a typical blue galaxy,
and has an Hα absorption line.
BE = blue emission galaxy. Overall SED shape of a typical blue galaxy with
an Hα emission line. In many cases, many emission lines (e.g.,
Hα, Hβ, and [OIII]5007) are prominent compared to the
continuum.
Note (3): Primary morphology with numerical code defined in table1 as:
--------------------------------------------------------------------------
Type Code Subclass
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Elliptical 100
Disk galaxy 2[0/1][0-7] [1=bar][subtype:0=0,1=a,2=b,3=c,4=d,5=m,
6=S or 7=edge-on]
Irregular 3[0/1]0 [number of prominent HII regions: none
to low =0, high=1]
Early-type dwarf gal. 4[0/1][0/1] [subtype:dE=0, dS0=1] [nucleus=1]
--------------------------------------------------------------------------
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- VCC [2/2096] VCC identifier
6- 10 A5 --- NGC NGC designation
12- 19 F8.4 deg RAdeg SExtractor Right Ascension (J2000)
21- 27 F7.4 deg DEdeg SExtractor Declination (J2000)
29- 37 F9.1 km/s cz ? SDSS heliocentric radial velocity
39- 46 F8.1 km/s cz2 [3010/108279]? NED heliocentric radial velocity
48 A1 --- MmV Membership of galaxy from VCC: M=Member,
P=Possible, B=background
50- 61 A12 --- MTypV Morphology from the VCC
63- 67 F5.2 mag umag SDSS u-band SExtractor AUTO magnitude
69- 73 F5.3 mag e_umag Error in umag
75- 79 F5.2 mag gmag SDSS g-band SExtractor AUTO magnitude
81- 85 F5.3 mag e_gmag Error in gmag
87- 91 F5.2 mag rmag SDSS r-band SExtractor AUTO magnitude
93- 97 F5.3 mag e_rmag Error in rmag
99-103 F5.2 mag imag SDSS i-band SExtractor AUTO magnitude
105-109 F5.3 mag e_imag Error in imag
111-115 F5.2 mag zmag [10.8/21.3] SDSS z-band SExtractor AUTO magnitude
117-121 F5.3 mag e_zmag [0.02/0.7] Error in zmag
123-128 F6.2 arcsec Rad [2.4/277.5] Kron r-band radius
130-134 F5.2 arcsec R50 [0.6/36.2] SExtractor Half-light r-band radius
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Feb-2015